Unlock instant, AI-driven research and patent intelligence for your innovation.

a hexagonal column 3 /bi 2 the w 6 Preparation method of composite photoelectrode thin film

An electrode film and composite light technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problem of no hexagonal column shape, and achieve the effects of good light stability, uniform distribution, and good photoelectric catalytic water oxidation activity.

Active Publication Date: 2020-08-18
TAIZHOU UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as we know, WO 3 / Bi 2 WO 6 Research on composite photocatalysts for environmental governance has been reported, but there is no hexagonal column type WO 3 / Bi 2 WO 6 Research reports on composite photoelectrodes, our preparation scheme will give a strong impetus to WO 3 Development of photoelectrodes and promotion of their application in the field of photocatalytic hydrogen production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a hexagonal column <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method of composite photoelectrode thin film
  • a hexagonal column <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method of composite photoelectrode thin film
  • a hexagonal column <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Preparation method of composite photoelectrode thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A hexagonal column type WO 3 / Bi 2 WO 6 The preparation method of the composite photoelectrode film, the specific steps are as follows:

[0017] At room temperature, prepare 15ml sodium tungstate with a concentration of 25mmol / L and ammonium oxalate solution with a concentration of 55mmol / L respectively, and slowly add 5ml of hydrochloric acid solution (3mol / L) to the sodium tungstate solution and stir evenly. Mix with ammonium oxalate solution and stir for 30 minutes; then transfer the mixed solution to a hydrothermal reactor, insert FTO conductive glass, and place it in a constant temperature blast drying oven at 140°C for 6 hours. After cooling, wash with water, dry, and calcine at 550°C. 2.5h, get WO 3 Electrode: Cut the electrode into small pieces of 1cm×2.5cm, add 150μL of bismuth nitrate aqueous acetic acid solution with a concentration of 0.1mmol / L, dry at room temperature, calcine at 550°C for 6h, after cooling, use 0.5mol / l HNO 3 Soak for 15h to remove Bi on the s...

Embodiment 2

[0020] A hexagonal column type WO 3 / Bi 2 WO 6 Preparation method of composite photoelectrode film, WO 3 The preparation steps of the film are the same as in Example 1, and the WO is prepared 3 After the membrane electrode, prepare 50ml of a 0.1mmol / L bismuth nitrate aqueous solution, and add concentrated acetic acid to adjust the pH to 0.6. After that, pipette 100μL of this solution to WO 3 The surface of the film electrode, dried at room temperature, calcined at 650℃ for 6h, after cooling, use 0.8mol / L HNO 3 Soak for 15h to remove Bi on the surface 2 O 3 Get WO 3 / Bi 2 WO 6 film.

[0021] figure 2 For the prepared WO 3 And WO 3 / Bi 2 WO 6 The ultraviolet-visible diffuse reflectance of the thin-film electrode shows that as the wavelength decreases, the WO 3 And WO 3 / Bi 2 WO 6 The absorbance of the film electrode gradually increases, WO 3 The band-edge absorption is at 470nm, while WO 3 / Bi 2 WO 6 The absorption of thin-film electrodes in the visible light region increases becaus...

Embodiment 3

[0023] A hexagonal column type WO 3 / Bi 2 WO 6 Preparation method of composite photoelectrode film, WO 3 The preparation steps of the film are the same as in Example 1, and the WO is prepared 3 After the membrane electrode, prepare 50ml of bismuth nitrate aqueous solution with a concentration of 0.02mmol / L, and add concentrated acetic acid to adjust the pH to 0.5. After that, pipette 200μL of this solution to WO 3 The surface of the film electrode, dried at room temperature, calcined at 600℃ for 4h, after cooling, use 0.5mol / l HNO 3 Soak for 15h to remove Bi on the surface 2 O 3 Get WO 3 / Bi 2 WO 6 film.

[0024] image 3 For WO 3 And WO 3 / Bi 2 WO 6 The linear scanning volt-ampere curve of the film electrode, the scanning speed is 20mV / s, and the output intensity of the xenon light source is adjusted to 100mW / cm 2 , The supporting electrolyte is a sodium phosphate buffer solution with a pH of 7 and a concentration of 0.1 mol / L. Under this condition, as the applied potential gradu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a hexagonal column type WO3 / Bi2WO6 composite photoelectrode film preparation method, and belongs to the technical field of material preparation, wherein the prepared compositephotoelectrode has characteristics of novel morphology, regular structure, high photon-generated carrier separation efficiency and excellent photoelectrocatalytic water decomposition performance, andcan achieve the continuous and stable hydrogen production under visible light. The preparation method mainly comprises: carrying out a hydrothermal reaction for a certain time by using sodium tungstate and ammonium oxalate as precursors and using an FTO electric-conduction glass as a substrate to grow a nano-plate-shaped WO3 film on the FTO substrate in in-situ; and adding a certain volume of theacetic acid aqueous solution of bismuth nitrate to the surface of the film as a template in a dropwise manner, carrying out high-temperature calcination, and self-assembling the nano-plate WO3 film into the hexagonal column type WO3 / Bi2WO6 composite film. According to the present invention, the composite photoelectrode has characteristics of simple preparation process, controllable condition andlow cost, and has wide application prospect in the field of future energy.

Description

Technical field [0001] The invention relates to a hexagonal column type WO 3 / Bi 2 WO 6 The preparation method of the composite photoelectrode film belongs to the technical field of material preparation. More specifically, the present invention provides a visible light-responsive hexagonal column type WO 3 / Bi 2 WO 6 The preparation method of the composite photoelectrode, the composite photoelectrode has uniform size, large photocurrent, high carrier separation efficiency, and stable hydrogen gas evolution. Background technique [0002] In the 21st century, energy and environmental issues have severely restricted human economic development. How to use solar energy, a renewable energy source, to achieve light energy conversion is an important topic for scientific researchers. Photoelectric catalytic technology uses semiconductor electrodes to absorb solar energy, convert photons into electron and hole pairs, and achieve effective water decomposition into hydrogen with the assistan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B1/55C25B11/051C25B11/091Y02E60/36
Inventor 熊贤强范利亚李江山武承林李天丁付帅
Owner TAIZHOU UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com